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Definition of Secondary atelectasis

Secondary atelectasis: Partial or total collapse of a lung or a segment of a lung that was once expanded, as may happen after chest surgery. Secondary atelectasis is in contrast to primary atelectasis in which there is failure of the lung to expand fully at birth.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=38750
Last Editorial Review: 6/14/2012

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